ReplyPreston's Guide. On-line or hard copy or both.
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Is there a good listing of stated AFUE's anywhere? Or even a table of average AFUEs by year?
I'm doing energy audits of older buildings and a lot of the heating systems do not list AFUE. They usually don't even list Btu Output, and sometimes don't have a model year listed.
I have tried to look up model numbers but even then it's hard to find AFUE info on older models even on the Manufacturer website.
Any help would be appreciated.
Gabe Nathanson
Bone Energy Services
Philadelphia, PA
Professional Member*
Preston's Guide. On-line or hard copy or both.
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